Hand-operated electric-circuit controller.



No. 852,386. PATENTED APR. 30, 1907'.

' R.P.JAGKSON.

HAND OPERATED BLECTRIO' 01mm CONTROLLER.

APPLICATION FILED DEG.18.1905.

WlTNESSES:

U'Nrrnn s re) RAY P. JACKSON, 01*

, WESTINGHOUSE PORATION F PEN To aIZZ- whom it may conce n:

Be it known that I, :RAY P citizen of the United States, of Vvilkinsburg, in the county of and State of Pennsylvania, hsve T new and useful Improvement in ernted Electric-Circuit Con y the following is a specification My invention relates 'to in v 5 electric circuit controllers and to such controllers as ere adopted electric railway vehicles.

The object of my invention means for automatically ret= :r l troller drum to a predeternnr on, that shell be simple and durable con trr tion and that shall exert f constant returning force'whetc' my r the angle through or the direction which the drum has been moved. m It is generally desirable, part railway vehicle service, to pro r for automatically returning the contact-bearing member oi? or master switch to e predete position so that the motors gov s'ne may be brought to rest in s becomes incapacitated.

has usually been accompli two springs which operated ii and oppositely to move the cor to the off position. The .1 tioned is open to objection because t occupied by the springs is l cause the returning; force 'vsri the drum rotates through diii'eri/nt The mechanism of my inventi prises, in general, a single helices axis of which is substantially to that ol the shettoi the or i d iflercnt plane, and which is so connected to the shaft by a of l the spring is compressed from one enc the handle is rotated in direction from the other end when the tatcd in the opposite direction. the total length of the springutnized both directions and a substantially uniform pressure is exerted throughout the entire range of drum rotation.

My invention is illustrated in the accorm panying drawings, in which Figure 1 is 8. front elevation of a in stc-r controller constructed in accordance there 515 with, the cover being removed to show the Ill l s gang; l

pro-

V ich one end wl '1 is i'orvcd I.

vi in llu numbers by 10st motion cmmerc 901x Pm scope.

0? rod, of the shaft 1 mtorzaliy mg: :1 mturning an d m;

H 113 (JODUIU 

